P245E
Particulate Filter Pressure Sensor B Circuit
Diesel particulate filter (DPF)
Generic OBD-II
Medium
What it means
P245E sets when the engine computer sees a problem in the circuit of the "B" particulate-filter (DPF) pressure sensor. That sensor measures exhaust pressure across the filter so the computer knows when to run a regeneration burn-off. With a bad signal, regeneration can be mistimed or skipped, so the filter can slowly clog even though the engine still runs.
Medium
Can I keep driving? Usually driveable short-term, but don't ignore it — a faulty DPF pressure signal can disrupt regeneration and, over time, clog the filter and cut power.
Common symptoms
What you'll notice
- Check-engine light on
- Reduced power or limp mode if regeneration is affected
- More frequent, longer, or failed DPF regeneration cycles
- Often no obvious driving symptom at first
Common causes
Most likely first
- Faulty particulate-filter differential-pressure sensor (the 'B' sensor)Likely
- Open, shorted, or chafed wiring at the sensorCommon
- Poor or corroded connector/electrical connectionCommon
- Blocked, cracked, or disconnected pressure sample hoses to the sensorLess often
- Less commonly, a failing ECM/PCMLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and confirm which sensor is the 'B' pressure sensor on your vehicle.
- Inspect the sensor connector and wiring for damage, heat, or corrosion.
- Check the pressure sample hoses for soot blockage, splits, or a loose fit.
- Compare the live pressure reading to the expected/known-good value.
- Replace the DPF pressure sensor if it reads out of spec, then clear and retest.
FAQ
Quick answers
Is it safe to drive with P245E?+
For short trips usually, but the ECM relies on this sensor to manage soot regeneration. Left unfixed it can lead to a clogged filter, forced power reduction, and a costly repair.
Can I just clear P245E?+
You can, but if the sensor or its wiring is faulty the code returns. Fix the circuit or sensor first so DPF regeneration works correctly.
Related codes
Often seen with P245E
Read & clear P245E yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX